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Search: id:A012850
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A012850 cosh(sec(x)*arctanh(x))=1+1/2!*x^2+21/4!*x^4+765/6!*x^6+46473/8!*x^8... +0
1
1, 1, 21, 765, 46473, 4371225, 594635613, 110691178325, 27018807872657, 8370279766396593, 3208469378545620005, 1491108362472114151469, 826269720877603294674201, 538334287550086657620232905 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Adjacent sequences: A012847 A012848 A012849 this_sequence A012851 A012852 A012853

Sequence in context: A078791 A143002 A062755 this_sequence A012645 A028469 A119414

KEYWORD

nonn

AUTHOR

Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

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